Spool or holder for commutators



0 A. VAN DUSEN.

SPOOL 0R HOLDER FOR COMMUTATORS.

APPLICATION FILED SEPT. 20, 1920.

Patented Aug. 8, 1922.

l 74 Z w 1/ UNITED STATES PATENT OFFICE.

CHARLES A. VAN nnsnlv, or TOLEDO, OHIO, ASSIGNOR TO THE TOLEDO STANDARD oonmnraron COMPANY, or TOLEDO, OHIO, A. CORPORATION or OHIO.

sroor, on HOLDER ron COMMUTATORS.

Specification of Letters Patent. Patented A119; 8, 1922,

Application filed September 20, 1920. seriaino. 411,565.

1 '0 all whom it may concern."

Be it known that I, Cnarnns A; VAN

DUsnN, a citizen of the UnitedStates, residing at Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Improvement in Spools or Holders for Commute-tors, of which the following the 28th day, of September, 1920.

In my prior patent above referred to, I have shown several types of a one-piece spool or holder for commutators having at its ends integral flanges which are swaged inwardly to segment clamping or holding position, preferably by a series of closing operations, as explained in my prior Patent No.

1,329,277, granted January 27, 1920. As ex plained in this last mentioned patent, the barrel or cylindrical part of the spool or holder is surrounded with an insulating ma terial preferably in plastic form when applied, and this is hardened preferably by a baking process prior to the last closing op eration, so that ;when the assembly issub jected'to the last closing operation, not only are the end flanges swaged inwardlyinto tight clamping engagement with the insulation overlying the tangs of the segments, but the inner edges of the segments are'clamped down tight against this insulating medium, producing an exceedingly effective and tight commutator.

The object of the present invention is to provide a one-piece spool orholder possessing all. the advantages of the holders di closed in my patents above referred to, as

well as performing all the functions thereo f,

and having certain improvements which in the final closing operation provide a practically squ are end at the end of the holder and also give a longer shaft bearing.

In the accompanying sheet of drawings wherein I have shown one embodiment only of my invention, Fig. l is a view partly in section and partly in side elevation of a one piece spool or holder embodying my invention; Fig. 2 is a similar view of the spool or holder as it appears after the final closing operation; and Fig. 3 is a sectional view of the completed commutator, employing my improved spool or holder.

, conical;

which'becomes exceedingly hard and unthe shaft bearing.

Fig. 1, the spool or holder has a barrel or cylindrical portion 10 and a shaft opening 11, and it is provided at its ends with integral segment clamping flanges 12. The inner faces of these flanges are preferably parallel and normal to the axis of the holder, and their outer faces 13 are on a; taper. The ends of the holder are recessed as shown at lhthe recesses here shown being somewhat It maybe statedat this point that these isegment clamping flanges are adapted tobe swaged inwardly onto the insulation 15,

(preferably mica) covering the tangs of the segments-16 of the commutator, and the ta pered faces or surfaces 13 are adapted to be forcibly pressed outward against the similar insulation within the overhanging portions ofthesegments as shown in 3, and this is preferably done as described in my prior Patent No. 1,329,277 in several closing operations. In the final closing operation the inner edges of the segments are tightly pressed or clampeddown against a hardinsulating medium 17 surrounding the barrel 10, this insulating medium being formed as described in Patent No. 1,329,277 and in Patent No. 1,354,006, granted. September 28th, 1920, in the name of S; N. Sloan, andconsisting of bakelite, asbestos soaked with shellac, or

other insulating material which can be applied in a plastic or semiplastic form and yielding by the baking process."

prior Patent No. 1,354,007 of September 28th, 1920, having fiangeswhose outer faces are on a taper and adaptedto bepressed outwardly against the overhanging portions of. the segments while the inner faces of the flanges are swaged inwardly to segment clamping position over the insulated surfaces of the tangs, the greatest bending of the flanges takes place a slight distance from the barrel or from the inner portions of the segments, the flanges being so shaped that the bending would'take place at the point stated in Order that the metal might be forcedor swaged to the desired position with reference to the tangs and overhanging por tions of the segments. This leaves the bore or shaft Opening rounded at its ends, and of necessity reduces somewhat the length of 00 With all the different spools shown in my 1' rorision or L V] i: i side i 3 in L 5 groo 'es oer: d

This leaves oliecticolly about their in are ends ill' the ends open insteni'l oi" the snnewhnt rounded ends, l

'l t ontn'in d taper or H inii' ends of the slmttt one :1 *nuch longer she prior spools of th s some gei' eral ftl'll) that some dei so less liehlity or curing the metal in the swaying operations "hon heretofore.

It might he mentioned in coi'iclns'ion that in itorl'ning' ill) imgn'ovel spool or holder the angle between the inner let feces of the ilzongcs and the tiapercd. tacos is mode somewhnt QI'OZIIEOI than 45, preferably shoot Li but when the flanges are swoo'ezl in w: 'lly to their linuil positions so that the inner 1nevion.slj pni'zillel faces occupy a. 417 position, the outer previous f tzsperrl l tHjLS or snrlnces 123 nor: lJSCOIHQ cylin di'ical sol-tones coaxial With the barre and during; the not swz'iging operation the angle between these faces is reduced in the drawing oporzition to a 415 1 ngle. It will. he noticed. also, by reference to Figs. 1 and 2,

their ndvontege lies in th il need not be l 1 xtent as with my that the diameter of the spool is reduced. in the closing operations, and that its length is also reduced.

ll hile I have shown only one jliorni oil. 1115* iinrention, I do not Wish to he confined to the precise details showinos the holder, particularly Ll its ends, may assume other shapes than herein illnstrnted.

Having described my invention, I claim 1. A onepiece spool. or holder for: com- Inntotors comprising :1 hod portion with inlepjral se lQllll clinnping flanges at its ends, end prom ed with c- Nicol orocwes o" rcccsses at the inner portions of the [1 i one-piece spool or holder in z" is coin n'isino' n cvlinilr-iml. hoi al 1 I 1 H I I having at its ends lntegrzil sogn'ient hoidnng; flanges, and l'HTOYMlPll with grooves :it the inner faces of the flanges.

33. o iol or holder for cone 7 ;nep1ece imitators conjiprising :1 o llindricul body pro rided it it) ends with inle 'rul segnient clumping flanges with relnt y tapered lilacs ridznted to engage insulation coverinn; the tongs and overhanging; portions of:

the segments When the flanges are IHWHM spool. 01' holder for com inn 'zztors eoniprising o cylindrical barrel 'il s living; at the junction 01" the segments with the ends of the lnn'rol, or at the ore ticinc inner mrtions of the flanges.

in tcstinion whereof, I hereunto illllX my sign itnre,

CHARLES A. VAN DUSEN. 

